Epoch to date question

[kemeris2000]

Code below produce wrong result as _math.imul return -944668072 instead of expected 1639732839000.
How to convert Epoch to human readable date string?

_date:
  _math.imul:
    - 1639732839
    - 1000

anything better than this?

_date:
  _number.parseInt:
    - _string.concat:
      - _number.toString:
        - 1639732839
      - '000'

[Gervwyk]

Hi @kemeris2000
You could also do:

_date:
  _product:
    - 1639732839
    - 1000

[kemeris2000]

Thank you